高技术通讯2011，Vol.21Issue(12)：1252-1257,6.DOI:10.3772/j.issn.1002-0470.2011.12.006
浅海水声信道中QC-LDPC码性能研究
Performance analysis of QC-LDPC codes over shallow water acoustic channels
摘要
Abstract
Considering that a shallow water acoustic (SWA) channel is characterized by rapid time-dispersive fading, multipath and narrow bandwidth, which has to use the error correcting code technique with short code length, good performance and easy implementation to improve the reliability of its communication system, the quasi-cyclic low density parity check ( QC-LDPC ) coding as an error correction coding scheme was applied to SWA channels. A system simulation model including QC-LDPC codes for the SWA channels was built. With the decoding algorithm of belief propagation (BP), the performance of the system was simulated over a typical three-multipath SWA channel under different code rates and girths. The performance comparison of QC-LDPC codes in different SWA channels was presented. A channel model was established according to the characteristic of the SWA channel environment in Xiamen harbor. The model was used to simulate the performance of QC-LDPC codes. The simulation results show that simple QC-LDPC codes can achieve almost the same performance of the random (3, 6)-LDPC codes, which proves the effectiveness and the good application prospects of QC-LDPC codes in SWA communication.关键词
准循环低密度奇偶校验( QC-LDPC)码/准循环/浅海水声信道/水声通信Key words
quasi-cyclic low density parity check (QC-LDPC) codes/quasi-cyclic/shallow water acoustic channel/underwater acoustic communications引用本文复制引用
陈友淦,许肖梅,冯玮,张兰..浅海水声信道中QC-LDPC码性能研究[J].高技术通讯,2011,21(12):1252-1257,6.基金项目
863计划(2006AA09Z108),国家自然科学基金(40776022),高等学校博士学科点专项科研基金(20090121110001)和中央高校基本科研业务费专项基金(201112G020)资助项目. （2006AA09Z108）
